131561671672 has 64 divisors (see below), whose sum is σ = 263401560000. Its totient is φ = 61484645376.

The previous prime is 131561671669. The next prime is 131561671721. The reversal of 131561671672 is 276176165131.

It is a super-2 number, since 2×131561671672² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669708 + ... + 1746724.

It is an arithmetic number, because the mean of its divisors is an integer number (4115649375).

Almost surely, 2^131561671672 is an apocalyptic number.

It is an amenable number.

131561671672 is an abundant number, since it is smaller than the sum of its proper divisors (131839888328).

131561671672 is a wasteful number, since it uses less digits than its factorization.

131561671672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77288 (or 77284 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The spelling of 131561671672 in words is "one hundred thirty-one billion, five hundred sixty-one million, six hundred seventy-one thousand, six hundred seventy-two".